Figure 3: Scattering rates.

(a) Time and fluence dependence of the phonon- (green) and Coulomb-induced (blue) out-scattering rates. The covered fluences correspond to 0 to 9 mJ cm⁻². In good approximation, does not depend on time and fluence. Before the centre of the excitation pulse, the out-scattering rate is proportional to the time-dependent pump-fluence with a constant offset Γ₀ (red lines). The grey area denotes the time range, where can be fitted with ∝Γ₀+ (red lines). (b) Time and fluence dependence of the Coulomb-induced in-scattering rates. In a time range well before the centre of the excitation pulse, can be fitted with ∝ (red lines).